Conference Papers

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    Influence of Superplasticizers on Blended Cement and Their Effect on Flow Characteristics by Incorporating PGBS as Partial Replacement for Fine Aggregates
    (Springer Science and Business Media Deutschland GmbH, 2021) Arpitha, D.; Sudarshan, V.J.; Thilak Kumar, Y.T.; C, C.
    Currently the upsurge practice of the mineral admixtures as an alternative for cement to cut down the carbonic gas emission, to reduce the cement cost, and to progress some technical recitals is truly the indispensable novelty advanced in construction industry. Mortars with different w/c require the use of appropriate and compatible chemical admixtures to achieve desirable consistency. The principal tactic delivered to contest in contradiction to this exertion is to choose the furthermost effective twosome cement–superplasticizer, facilitating to attain a determined water reduction, an enhanced flow, and an adequate rheology. Processed Granulated Blast Furnace Slag (PGBS) incorporated as partial replacement for Fine Aggregates (FA) along with different types of Superplasticizers (SP) for different dosages, which were chemically based on Lignosulfonate (LS), Sulphonated Naphtha Formaldehyde (SNF), and Polycarboxylate Ether (PCE), was used to check the behavior of flow characteristics in this work. The fusion of Portland pozzolana cement (PPC) along with partial replacement of fine aggregates has resulted to understand the better flow interaction between the cementitious materials and under different water–cement ratio (w/c). © 2021, Springer Nature Singapore Pte Ltd.
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    Study on Processed Granulated Blast Furnace Slag as a Replacement for Fine Aggregates for the Greener Global Construction
    (Springer Science and Business Media Deutschland GmbH, 2023) Arpitha, D.; C, C.; Kappadi, P.
    As innovation in concrete technology advances and the environment weakens, it is currently evident that the boundless utilization of construction materials and its initial expense being the common determination model has become a routine with regard to the past. Since there is great interest for raw materials and natural resources are rare, it is expected to utilize a high volume of alternative materials in concrete that would be monetarily beneficial like crushed sand, blast furnace slag, etc. An experimental investigation was carried out to examine the behaviour of mortars incorporating partial volumes of secondary material to fine aggregates. Processed granulated blast furnace slag (PGBS), newly processed slag which had overcome the limitations of granulated blast furnace slag obtained as a by-product during the extraction of steel was tested for fine aggregate (FA) replacement. Several combinations of mortar mixes were prepared using Lignosulfonate (LS), Sulphonated Naphthalene Formaldehyde (SNF) and Polycarboxylate Ether (PCE)-based superplasticizers (SP) for 0 and 50% replacement levels of FA by PGBS to recognize the feasible optimum dosage of SP required to achieve desired flow characteristics of mortars. Based on the optimum dosage of SP and w/c obtained, mortar cubes were prepared and cured for 3, 7, and 28 days. These cubes were tested for compressive strength periodically, the results revealed that PCE-based SP exhibited better performance concerning flow behaviour and strength gain parameters along with the effective reduction in w/c for both 0 and 50% FA replaced mixes. PGBS exhibited higher strength when compared to 0% replaced mixes though there was a slight increase in water content required for the cohesive mix. © 2023, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.
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    Performance of Alternate Superplasticizers on Performance of Self-compacting Geopolymer Mortars—An Experimental Study
    (Springer Science and Business Media Deutschland GmbH, 2024) Prakash, G.B.; Mahendra, K.; Tanush, L.; Narasimhan, M.C.
    Geopolymer binders are the best alternatives to Ordinary Portland cement in the view of carbon impact on the environment. The effect of addition of different types of superplasticizers (SPs) on the flow and compressive strengths of a class of self-compacting geopolymeric mortar (SCGM) mixes is investigated in the present study. Three different kinds of SPs, namely modified Polycarboxylate Ether (MPCE), Polycarboxylate Ether (PCE), and Sulfonated Naphthalene Formaldehyde (SNF), were used in the production of SCGM with varying proportions at 1, 1.5, and 2% by weight of the binder. Results revealed that modified PCE-based SP showed better results in flow and compressive strength (CS) in comparison to PCE and SNF-based SPs. However, an increase in the dosage of SP had less/adverse effect on the flow properties. A maximum slump flow of 270 mm was observed for a modified PCE-based SP at 1.5% dosage, while the highest CS of 34 MPa was observed at 1.5% dosage of the same SP. Scanning electron microscope (SEM) analyses were carried out on a few selected SCGM mixes. © The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd. 2024.